CN202153385U - Electromagnetic antitheft apparatus used for library and bookshop - Google Patents
Electromagnetic antitheft apparatus used for library and bookshop Download PDFInfo
- Publication number
- CN202153385U CN202153385U CN2011202990313U CN201120299031U CN202153385U CN 202153385 U CN202153385 U CN 202153385U CN 2011202990313 U CN2011202990313 U CN 2011202990313U CN 201120299031 U CN201120299031 U CN 201120299031U CN 202153385 U CN202153385 U CN 202153385U
- Authority
- CN
- China
- Prior art keywords
- library
- alarm
- control module
- amplifier
- magnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Burglar Alarm Systems (AREA)
Abstract
The utility model relates to an antitheft apparatus, in particular to an electromagnetic antitheft apparatus used for a library and a bookshop, comprising a power supply module, a magnetic field detection module, a control module, and an alarm, characterized in that the power supply, the magnetic detection module and the alarm are respectively connected with the control module, the control module is provided with an amplifier, an analog-to-digital converter and a single-chip microcomputer, the single-chip microcomputer is connected with the amplifier, the amplifier is connected with the analog-to-digital converter, the power supply module converts 220 V alternating current into plus-minus 5 V direct current through rectification, filtering and voltage dividing, etc., by using LM317 and LM337, etc., the magnetic field detection module is provided with a linear magnetic field sensor, and a small cylindrical buzzer can be used as the alarm. The electromagnetic antitheft apparatus used for a library and a bookshop has the remarkable advantages of being low in cost, excellent in effect, reasonable in structure, simple in operation and high in reliability, etc.
Description
Technical field
The utility model relates to a kind of anti-theft device, is a kind of electromagnetism anti-theft device that is used for library and bookstore specifically.
Background technology
At present the anti-theft measure of library and bookstore is exactly nothing but common detecting gate, and a big crucial leak wherein: to the magnetic stripe demagnetization, and then sporting book band is gone out bookstore or library with strong magnet; On Qingdao, Lanzhou and other places, the news report of this type of book of stealing incident has been arranged, bookstore is with a toll of units up to ten thousand.
On the current books antitheft market; Just worked out detecting gate with magnet measuring ability; But its principle is that the magnet sense channel is integrated on the detecting gate; The mode of utilization emission and detection harmonic wave realizes the measuring ability of magnet, owing to this mode also can be reported to the police to common ferrous material, thus the phenomenon that generation is reported by mistake.According to the message of the producer of Longkou City, Yantai, the detections binary channels price of this function is about 20,000 yuan, exceeds more than 10,000 yuan than common detecting gate, and price is extremely expensive.
Summary of the invention
The utility model is to the deficiency that exists in the existing books anti-theft technique, propose a kind of rational in infrastructure, use the electromagnetism anti-theft device that is used for library and bookstore simple, that reliability is high.
A kind of electromagnetism anti-theft device that is used for library and bookstore; Comprise power module, magnetic field detection module, control module, alarm; It is characterized in that power module, magnetic field detection module and the alarm control module that is connected with control module respectively is provided with amplifier, analog to digital converter and single-chip microcomputer; Wherein single-chip microcomputer is connected with amplifier, and amplifier is connected with analog to digital converter.
Power module in the utility model mainly adopts rectifier bridge, lm317, and lm337 etc. with the 220v alternating current, are to export the direct current of positive and negative 5v through step transitions such as rectification, filtering, dividing potential drops.
Be provided with linear magnetic field sensor in the magnetic field detection module in the utility model, field signal is converted into voltage signal,, make field signal be convenient to detect intuitively and handle through follow-up signal processing circuit.
Single-chip microcomputer in the utility model on the control module adopts STC12C5A16AD, is used to control the duty of whole device and alarm threshold etc. is set.
Alarm can adopt cylindrical little hummer in the utility model, is used for realizing reporting to the police.
The utlity model has that cost is low, effective, rational in infrastructure, simple to operate, the high advantage significantly of reliability.
Description of drawings:
Accompanying drawing 1 is the structural representation of the utility model.
Accompanying drawing 2 is a kind of circuit theory diagrams of the utility model.
Reference numeral: power module 1, magnetic field detection module 2, control module 3, alarm 4, amplifier 5, analog to digital converter 6, single-chip microcomputer 7.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described:
The utility model provides a kind of electromagnetism anti-theft device that is used for library and bookstore; Comprise power module 1, magnetic field detection module 2, control module 3, alarm 4; It is characterized in that power module 1, magnetic field detection module 2 and alarm 4 are connected with control module 3 respectively; Control module 3 is provided with amplifier 5, analog to digital converter 6 and single-chip microcomputer 7, and wherein single-chip microcomputer 7 is connected with amplifier 5, and amplifier 5 is connected with analog to digital converter 6.
The power module 1 main rectifier bridge that adopts in the utility model, lm317, lm337 etc. with the 220v alternating current, are to export the direct current of positive and negative 5v through step transitions such as rectification, filtering, dividing potential drops.
Be provided with linear magnetic field sensor in the magnetic field detection module 2 in the utility model, field signal is converted into voltage signal,, make field signal be convenient to detect intuitively and handle through follow-up signal processing circuit.
Single-chip microcomputer 7 in the utility model on the control module adopts STC12C5A16AD, is used to control the duty of whole device and alarm threshold etc. is set.
Alarm 4 can adopt cylindrical little hummer in the utility model, is used for realizing reporting to the police.
The utility model is in use supplied power through 1 pair of whole device of power module; Linear magnetic field sensor in the magnetic field detection module 2 is gathered the field signal in the testing environment; And convert electric signal into and send in the control module 3 that is connected with magnetic field detection module 2; The amplifier 5 of field signal in control module 3, the processing successively of analog to digital converter 6 by single-chip microcomputer 7 order of entering a judgement, and are sent into this order in the alarm 4; Report to the police, the utlity model has that cost is low, effective, rational in infrastructure, simple to operate, the high advantage significantly of reliability.
Claims (3)
1. electromagnetism anti-theft device that is used for library and bookstore; Comprise power module, magnetic field detection module, control module, alarm; It is characterized in that power module, magnetic field detection module and the alarm control module that is connected with control module respectively is provided with amplifier, analog to digital converter and single-chip microcomputer; Wherein single-chip microcomputer is connected with amplifier, and amplifier is connected with analog to digital converter.
2. a kind of electromagnetism anti-theft device that is used for library and bookstore according to claim 1 is characterized in that the single-chip microcomputer on the said control module adopts STC12C5A16AD.
3. a kind of electromagnetism anti-theft device that is used for library and bookstore according to claim 1 is characterized in that said alarm adopts cylindrical little hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202990313U CN202153385U (en) | 2011-08-17 | 2011-08-17 | Electromagnetic antitheft apparatus used for library and bookshop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202990313U CN202153385U (en) | 2011-08-17 | 2011-08-17 | Electromagnetic antitheft apparatus used for library and bookshop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153385U true CN202153385U (en) | 2012-02-29 |
Family
ID=45693880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202990313U Expired - Fee Related CN202153385U (en) | 2011-08-17 | 2011-08-17 | Electromagnetic antitheft apparatus used for library and bookshop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526615A (en) * | 2020-12-25 | 2021-03-19 | 青岛微探智能科技有限公司 | Magnetic fiber detector |
-
2011
- 2011-08-17 CN CN2011202990313U patent/CN202153385U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526615A (en) * | 2020-12-25 | 2021-03-19 | 青岛微探智能科技有限公司 | Magnetic fiber detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103794023B (en) | A kind of low-power consumption Anti-dismantling alarm device | |
| CN205229084U (en) | Quality of water automatic monitoring system based on GPRS | |
| CN205791595U (en) | There is the lithium battery group of integrated pipe Ore-controlling Role | |
| CN204214486U (en) | The electromagnetic flowmeter that a kind of battery-efficient rate is powered | |
| CN202153385U (en) | Electromagnetic antitheft apparatus used for library and bookshop | |
| CN201638331U (en) | Book electromagnetic anti-theft device | |
| CN104459185A (en) | Motor rotating speed measuring apparatus based on ATmega8L single-chip microcomputer | |
| CN201489074U (en) | Leakage fire sensing circuit | |
| CN106771533A (en) | A kind of alternating current current detection circuit that can reflect direct current biasing state based on Magnetic isolation | |
| CN2706767Y (en) | Lightning recorder | |
| CN202581838U (en) | Intelligent monitoring and alarming device for gas leakage of water heater | |
| CN202649318U (en) | Multifunctional electric power meter with voltage phase sequence detection function | |
| CN202133726U (en) | Insulator detector based on medium response | |
| CN201697988U (en) | Fan state detection circuit | |
| CN204168001U (en) | A kind of intelligent duplicate power supply automatic change-over based on DSP | |
| CN205138558U (en) | Electromechanical conversion sensor of hall switch suitable for intelligence water gauge | |
| CN201331564Y (en) | Intelligent creepage and fire detection circuit system | |
| CN202794144U (en) | Intelligent gas detection sensor | |
| CN202748355U (en) | Detection device for a variety of gas | |
| CN204241539U (en) | A kind of electricity isolation module circuit | |
| CN203101331U (en) | Portable pipeline flux leakage detecting device | |
| CN203615975U (en) | Rotary wing type liquid-flow annunciator | |
| CN103354372A (en) | Intelligent battery management apparatus | |
| CN203374458U (en) | Air compressor and display system thereof | |
| CN203561453U (en) | Switch cabinet temperature detecting device based on thermocouple |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20120817 |